Thermoplastic resin composition and process for producing the same.

摘要

Disclosed herein is a thermoplastic resin composition which comprises: (a) a polyphenylene ether resin or a polyphenylene ether-containing resin composition, (b) a polypropylene grafted with a styrene-based monomer and/or a propylene copolymer grafted with a styrene-based monomer, (c) an ethylene- alpha -olefin copolymer grafted with a styrene-based monomer, said ethylene- alpha -olefin copolymer having a density of 0.85-0.91 g/cm<3> and a maximum melting peak temperature of 100 DEG C and above measured with a differential scanning calorimeter (DSC), and (d) an optional rubbery substance. Also disclosed herein is a process a process for producing a thermoplastic resin composition which comprises incorporating a preblend composed of: (a min ) a polyphenylene ether resin or a polyphenylene ether-containing resin composition, (b min ) a polypropylene and/or a propylene copolymer, (c min ) an ethylene- alpha -olefin copolymer having a density of 0.85-0.91 g/cm<3> and a maximum melting peak temperature of 100 DEG C and above measured with a differential scanning calorimeter (DSC), and (d min ) an optional rubbery substance with a styrene-based monomer and an organic peroxide, followed by kneading with heating. The thermoplastic resin composition has good moldability and yields molded articles having well-balanced physical properties.